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    WEAK COVALENT CROSSLINKS IN THERMOSET MATERIALS FOR INCREASED TOUGHNESS
    5.
    发明申请
    WEAK COVALENT CROSSLINKS IN THERMOSET MATERIALS FOR INCREASED TOUGHNESS 有权

    公开(公告)号：US20220002573A1

    公开(公告)日：2022-01-06

    申请号：US17200617

    申请日：2021-03-12

    Applicant: Align Technology, Inc.

    Inventor： Michael Christopher COLE

    IPC: C09D133/06 ,  C08F220/18 ,  C09D4/00 ,  A61C7/08 ,  A61C7/10 ,  B33Y70/00

    Abstract: This disclosure provides polymeric materials comprising weak crosslinking covalent bonds and/or weak crosslinking units comprising a weak covalent bond. Weak covalent bonds can be used in place of hydrogen bonds present in traditional polymeric materials (e.g., polyurethanes). Advantageously, the toughness can be controlled by varying the strength of weak covalent bonds and/or by varying the number of weak covalent crosslinks. Crosslinked materials applying the weak covalent crosslinking bonds can be used to create tough materials able to resist stress relaxation. Further, the present disclosure provides polymer chains and polymeric materials comprising inchain loops (also referred to herein as rings). The inchain loops comprise weak bonds and/or weak bridges comprising at least one weak bond. This disclosure also provides compositions comprising the polymer chains, materials comprising the polymer chains, monomer units that can react to form inchain loop-comprising polymer chains, resins comprising the monomer units, and related materials, appliances, and uses.

    METHOD OF INKJET PRINTING ONTO ALIGNERS
    7.
    发明申请
    METHOD OF INKJET PRINTING ONTO ALIGNERS 审中-公开

    公开(公告)号：US20200254785A1

    公开(公告)日：2020-08-13

    申请号：US16859749

    申请日：2020-04-27

    Applicant: Align Technology, Inc.

    Inventor： Michael Christopher COLE

    IPC: B41J11/00 ,  A61C7/08 ,  C09D11/322 ,  B41J3/407 ,  C09D11/101 ,  B41M5/00

    Abstract: Provided herein are methods of obtaining good photocured-ink adhesion to low surface energy materials. The methods have greatly improved adhesion of photocured ink on low surface energy materials, including those that are subjected to high humidity or wet environments. The methods take into account the glass transition temperature (Tg) of the materials and the onset for the glass transition temperature, including ink applied to an exposed surface of the material at an elevated temperature that is close to the Tg of the material. The ink is allowed to sit briefly or soak, such as for more than 1 second, before the ink is cured. The ink may be photocured. Furthermore, the methods do not require solvents or surface treatment, including plasma or corona treatments, to obtain good ink adhesion.

    ADDITIVE MANUFACTURING USING VARIABLE TEMPERATURE-CONTROLLED RESINS
    8.
    发明公开
    ADDITIVE MANUFACTURING USING VARIABLE TEMPERATURE-CONTROLLED RESINS 审中-公开

    公开(公告)号：US20230295365A1

    公开(公告)日：2023-09-21

    申请号：US18186023

    申请日：2023-03-17

    Applicant: Align Technology, Inc.

    Inventor： Michael Christopher COLE ,  Peter DORFINGER

    IPC: C08F283/01 ,  B33Y10/00 ,  B29C64/124 ,  A61C7/08 ,  A61C7/10

    CPC classification number: C08F283/01 ,  B33Y10/00 ,  B29C64/124 ,  A61C7/08 ,  A61C7/10 ,  B29C64/223

    Abstract: Provided herein are systems and processes to control multiple temperatures in additive manufacturing. Such temperature control adjusts polymer properties and facilitates processing of materials to form 3D objects. The systems and processed disclosed herein also facilitate the processing of typically difficult-to-process materials and deliver such materials to a photocuring zone configured to photopolymerize materials into 3 dimensional objects with a layer-by-layer process. Such processes can include the steps of heating a resin to a flowable temperature, applying the resin to a carrier, cooling the film to increase viscosity or to solidify the resin, and applying the film containing the resin onto an area being printed, then photocuring the film. Also provided herein are resins and related polymer materials having properties that are tunable with exposure to more than one temperature zone. The formed polymers can include multiple regions of polymer material, each independently having distinct properties. Processes and systems are also provided herein that are configured to produce polymeric materials having multiple regions with distinct properties from a single-component formulation.

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